Add BLAKE via libblake>=1.1 (this version introduced libblake_init())

Signed-off-by: Mattias Andrée <maandree@kth.se>

1 files changed, 98 insertions, 0 deletions

diff --git a/libhashsum_init_blake256_hasher.c b/libhashsum_init_blake256_hasher.c
new file mode 100644
index 0000000..202dc37
--- /dev/null
+++ b/libhashsum_init_blake256_hasher.c
@@ -0,0 +1,98 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+#ifdef SUPPORT_BLAKE256
+
+
+LIBHASHSUM_1_NONNULL_
+static size_t
+process(struct libhashsum_hasher *this, const void *data, size_t bytes)
+{
+	return libblake_blake256_update(&this->state.blake256.s, data, bytes);
+}
+
+
+LIBHASHSUM_1_NONNULL_
+static int
+finalise_const(struct libhashsum_hasher *this, const void *data, size_t bytes, unsigned extra_bits)
+{
+	const uint8_t *m = data;
+	size_t r;
+
+	if (extra_bits > 7U) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	r = libblake_blake256_update(&this->state.blake256.s, data, bytes);
+	m = &m[r];
+	bytes -= r;
+
+	memcpy(this->state.blake256.buf, m, bytes + (size_t)(extra_bits > 0U));
+	if (extra_bits)
+		this->state.blake256.buf[bytes] = libhashsum_reverse_byte__(this->state.blake256.buf[bytes]);
+	libblake_blake256_digest(&this->state.blake256.s, this->state.blake256.buf, bytes,
+	                         extra_bits, NULL, this->state.blake256.buf);
+	memset(&this->state.blake256.s, 0, sizeof(this->state.blake256.s));
+	this->hash_output = this->state.blake256.buf;
+	return 0;
+}
+
+
+LIBHASHSUM_1_NONNULL_
+static int
+finalise(struct libhashsum_hasher *this, void *data, size_t bytes, unsigned extra_bits, size_t size)
+{
+	uint8_t *m = data;
+	size_t r;
+
+	if (extra_bits > 7U) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	r = libblake_blake256_update(&this->state.blake256.s, data, bytes);
+	m = &m[r];
+	bytes -= r;
+	size -= r;
+
+	if (size < libblake_blake256_digest_get_required_input_size(bytes, extra_bits, NULL)) {
+		memcpy(this->state.blake256.buf, m, bytes + (size_t)(extra_bits > 0U));
+		m = this->state.blake256.buf;
+	}
+	if (extra_bits)
+		m[bytes] = libhashsum_reverse_byte__(m[bytes]);
+	libblake_blake256_digest(&this->state.blake256.s, m, bytes, extra_bits, NULL, this->state.blake256.buf);
+	memset(&this->state.blake256.s, 0, sizeof(this->state.blake256.s));
+	this->hash_output = this->state.blake256.buf;
+	return 0;
+}
+
+
+int
+libhashsum_init_blake256_hasher(struct libhashsum_hasher *this)
+{
+	libblake_init();
+	this->algorithm = LIBHASHSUM_BLAKE256;
+	this->algorithm_string = "BLAKE256";
+	this->input_block_size = 64U;
+	this->hash_size = LIBHASHSUM_BLAKE256_HASH_SIZE;
+	this->hash_output = NULL;
+	this->supports_non_whole_bytes = 1;
+	this->process = &process;
+	this->finalise_const = &finalise_const;
+	this->finalise = &finalise;
+	this->destroy = NULL;
+	libblake_blake256_init2(&this->state.blake256.s, NULL);
+	return 0;
+}
+
+
+#else
+int
+libhashsum_init_blake256_hasher(struct libhashsum_hasher *this)
+{
+	(void) this;
+	errno = ENOSYS;
+	return -1;
+}
+#endif